|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||K-72: Evaluation of Structural Differences Among Modified Brazilian Clay by Ammonium Quaternary Salts
||Jessica de Carvalho Arjona, Maria das Grašas Silva-Valenzuela, Bianca Bottega Michel, Tatiana Oliveira Costa, Gilmar de Oliveira Pinheiro, Thamyres de Carvalho Cardoso, Francisco Rolando Valenzuela-Diaz
|On-Site Speaker (Planned)
||Jessica de Carvalho Arjona
Organoclays are clay minerals which have their surface modified by surfactants agents. They are widely used in several applications: in polymer/clay nanocomposites, as adsorbents of organic pollutants, as rheological control agents and others. A purified Brazilian clay was treated with three different commercials ammonium quaternary salts named Sunquart CT 50, Armosoft E and Arquad PC. The three different organoclays obtained were analyzed by X-ray Diffraction (XRD), Rietveld method and Fourier Transformed Infrared (FTIR) to verified the differences of their structural properties and the quantity of salt was adsorbed by the clay. Results showed that the salts were incorporated in the clay structure, confirming the organophilization. However, all the three organoclays present differences among their structures. Armosoft E presented the most increase clay basal distance, while the Sunquart one present the less increased one. Indicating that the size and structure of the molecule of salts can affect clay intercalation.